Valve.



air Q No. 881,060. r r v V PATENTED MAR. 3, 1908. J. J. COOK.

VALVE.

'Armonlox mm was 10, 1907.

ZZYnaasea- 4 1/666/(60/3 J! O. W I L 01 01 J COO/6.,

UMTED srritriis Pit TEN (micron.

JOHN J. (100K, ()I- MEDFORD, MASSACHUSETTS, ASHIGXOR TO VHUSBY FTl-IA)! GAGE AND VALVE COMPANY, OF BOSTON, MASSACHUSETTS. A CUKPURAUUN ()l" MASSAL'HUSETLS.

' VALVE i No. as: .060.

Applicatinn filed June 10,

To all 1071 om it may ('UIlL'Pfii.

Be it known that 1-, JOHN J. COOK, a citizen of 'the United States, and resident of Mediorii, in the county of Middlesex and State of llnssachusetts, have invented certain new and useful improvements in Yalvcs, of which the following is a specification.

My invention relates to spring-sent valves, so called from the fact that. a springing action takes place between the seats (disk and seat roper) each time the valve. is operated, or its temperature variei T he valve is adapted for steam, water, compessctl air, gas or other fluid.

The object. of the invention is to secure :1 close contact between the seats when closed,

thus preventing leakage, to maintain such contact during, any contraction or t'ix'pnn inn of the ports caused by variation in temperature, and to minimize the friction between the seats.

The invention is an improvementon the spring-sent valve deseriheil in the United States Letters Patent, No. 553,939, issued February 4. 1895. to James Rohinson and it is illnst-i ted my the accompanying drowings in which similar characters refer to similar parts throughout.

i igure 1 is an elevation of the Robinson spsing-scnt valve referred to, with portions broken am; and nortionsm section.

is an enlarged cievsition partly in. sco'tion. showing mv improvement. Fig. 3 is 41section of theilisk and sent showing their angles."

Robinson's valve comprises itn-einnuhuj seat 1 having an exterioriy conical hop-export 2 with an interior, vertical, annular groove 3 and two-acting disk 4 havin scorrespondmg, annular, interior-1y conical uwcr punt 51cm! ing into a. corresponding, interior, vertical: annular groove 6, all so proportioned and having such angles that, when the disk is sealed, the entire area of the exterior, conical surface of the seat engages the entire area of theintcrior, conical surface of the tiisk,\\hile the interior, vertical grooves of sent and disk are joined end to end. to form one ertical, 2UP nuhir groove; thus tendin to impair the resiliency of the parts and t ctlicienc v of the valve, and causing great friction hct ween the seats. llloreover, it frequently hnppens in valves of the .ltobinson typc thnt, in grinding Specification e! Lst'pezs Patent.

Patented. March 1908;

i907. Serial No. 378,167.

the sciits together. the circular. acute, migulnr edge of one sent grinds into some \nrt. of' the conicni surl ute of th other, t erchy forming :1 shoulder which prevents the master aipronch of the seats to one another. "T0- nlwiutc these diilicultics! make the disk and seat with their corresponding parts of diti'erent pro iortions and with different angles, instead o. having them correspond at all yoints us in the Robinson valve. 1 Fig. 2 which illustrates my improved valve, shows the seat- 7 and disk 8 so proportioned that the exteriorly conical, annular up or part 9 of the seat with its vertical, mum a! groove 10 extends into the vertical. annular groove 1 l in thc ntcri u'ly eonicnl nnnulusli of the dish, and the exterior, conicni surface oi the seat incloscs 1i. lesser angle. t-linn that 70' inclosed by the interior. conical surface of the di k: the re ult hcing thntthe contactht tween the disk and seat is suiist intiully cnrvi,- linenr. constituting a circle in a plane parallel to that of the base of the valve. The groove in the scat should he deep enough and the- :conicnl \vnllswot' the sent of the. rightthickness to insure their iesilioncy. 'iiiere'is; douhtless, some resilien y in Lite conical \vsllsoi 1 the disk hutmnch less than thst the. walls of the sent. it is nhvions lint the angles andproportions of the out and disk may. be.- transposed Wiihuzit infecting the. principleof the invention. v Figs. 2 and 3 show a conical seat whose eit- S6 tcrior, conical S'Hl'i llfi? cxtended'wouhi inclose nnnnglc of U0", Enid n. disk \vhosc-ilill'!iUI' .('(nll lii sutfnct extended wyouid inclose.- n'imgienf 70. Lhowevcr, do notliinittnyj-f.

Sell to valves of Such ii tensions or rtlatifia proportions. .In o )ZYtliiUIi. as pressure is exerted upon \tlle' d sl'z the inclosed z-Ullifi of the sent, 60?- will. and to incr gse vhi tthe int-insert ting oi thc disli 'iui, will also tend toincrense. hut to a less degree, and, tlslri itlfittil-b- 'gllt circle of contactbetween the disk n n' i seatwill hronden to a greater or less exten depending "(It)". the amount. of pressure-ox ertcd upon tm: disk,

.i'lllVill described my claim our desire to secure is:

invention. wliait, hy heatlets Patent In :ivnlve'thecotnhina tion. withunminnlm;

pzxri leading into an inmriur, vertical, an-

sent having an extr-riarly conical uppvr mart grower angle Um i110 mniml walls n!" lhv pmvidml with an ink! Ur, vertical, annular sum: substantially m l.'. mm! ,10'

In mst-im-my when'w f l lulu: ullixurimy grimve, wi' 11 emu-cling -'l'\ having a currespmulmg annular, nuzrmrly come-a1 lower I signature, {H'CSL'IHP (-1 hm vrnuohsvs.

JOHN J COOK. nular grvuw. the grume of the disk being of Witnesses: greater width than the grume of the seat, HELEN lhcumnnx, and the cnuiml walls 01' the disk imriusing a RALPH W. F0 11m. 

